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[Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless
From: |
Arun Giridhar |
Subject: |
[Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless |
Date: |
Wed, 27 Jul 2022 13:58:45 -0400 (EDT) |
Follow-up Comment #7, bug #62817 (project octave):
So! I ran this test a statistically large number of times and found it's not
100% repeatable!
Test:
for i in `seq 1 100`; do octave --eval "test interpn"; done >/tmp/tmp
Results: it fails about half the time, and within the failures about 1/3 is
for the imag part and 2/3 for the real part.
$ grep PASSES tmp | sort | uniq -c
48 PASSES 18 out of 19 tests
52 PASSES 19 out of 19 tests
$ grep ASSERT tmp | sort | uniq -c
15 ASSERT errors for: assert (imag (vi_complex),vi_imag)
33 ASSERT errors for: assert (real (vi_complex),vi_real)
The numerical errors are all of the order of eps or less:
$ cat tmp | grep exceeds | awk '{print $(NF-5)}' | sort -n | uniq -c
34 1.1102e-16
2 2.2204e-16
1 2.7756e-17
14 5.5511e-17
As you said, it's better solved by setting the seed (or not using random
numbers) than only by increasing the tolerance.
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- [Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless, Arun Giridhar, 2022/07/26
- [Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless, Markus Mützel, 2022/07/27
- [Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless, Arun Giridhar, 2022/07/27
- [Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless, Markus Mützel, 2022/07/27
- [Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless, Arun Giridhar, 2022/07/27
- [Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless, Arun Giridhar, 2022/07/27
- [Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless, Markus Mützel, 2022/07/27
- [Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless,
Arun Giridhar <=
- [Octave-bug-tracker] [bug #62817] Regression in interpn, likely harmless, Arun Giridhar, 2022/07/28